The next three photos are all shot under LED downlights in my office and all WIDE open at T1.5

Here's Sheldon sitting on top of and in the middle of the pair of 24" LED screens, it's quite clear where the focal plain is..._9057140 by aussiephil1960, on Flickr

The circular green dot in this one is from the green power led on the canon inkjet printer about three feet behind sheldon..._9057143 by aussiephil1960, on Flickr

In the air plant parrot shot below there is a line from the left leg going to the right.... it's actually a very fine spider web thread that was invisible to the naked eye. the cutting mat gives a very clear view of the shallow DOF.
I think the background is smoothly blurred_9057150 by aussiephil1960, on Flickr

I think i need to order a variable ND filter to allow me to use this wide open in sunlight. Actually i'm now super keen for the speed booster to arrive

That's OK as i'm not planning to use the metabones one.... don't need the electronics for the Samyang. I have a chinese version slow boating it, happy with the FD version I have.

Just to add;
I was concerned the geared rings may have been hard on the hands, well I should not have worried. The focus and aperture rings are silky smooth and the gear rings just provide a reassuring grip and even one finger operation. Need some daylight tomorrow to shoot some more images.

Impressive stuff Phil. Is this the same optical formular as Samyang 85mm f1.4?

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It is often quoted as being identical however a number of reviews online suggest the Cine series whilst being the same basic formula may be of a higher quality build, likely though it's just tolerances differences.

Had a bit more time to play with this lens today.
As referenced by various reviews the lens hood itself feels cheap and doesn't really click onto place, it is functional and I haven't yet knocked it off. The 72mm filter threads feel like they may be easy to cross thread so I've ordered a UV filter to go on the front.
The lens itself feels like a tank but handles really smoothly.

Some more photos..... no cropping just resize to my nominal 2560 for flickr
Ball of wool, about 6 feet away under LED downlight and at T1.5_9057159 by aussiephil1960, on Flickr

Today added a couple of extension tubes and went looking for a small flower. The little purple flower is 10mm across, no cropping of the images. The tubes brought the min focal distance down from 3 feet to about 15"
It will never win prizes as a macro lens but sharpened right up around F4 or maybe it was the DOF got deep enough to deal with hand held. These were all shot effectively hand held, I didn't want to get the tripod out._9067190 by aussiephil1960, on Flickr_9067188 by aussiephil1960, on Flickr_9067184 by aussiephil1960, on Flickr

Still seeking a portrait person, have taken a few and very happy but none I can throw online, instead here's a couple I took last night. Both handheld and from memory fairly wide if not fully open. Both with the speed booster on.
Both say a lot for the EM-1 5 axis stabilisation as well.
This one was 1/20th @ 5000ISO and despite the blue in the shy this was effectively fully dark with just town street lights_EM00552 by aussiephil1960, on Flickr

Essentially the same spot looking the other way, 1/50th second. I like the bokeh._EM00551 by aussiephil1960, on Flickr

The blue parrot was right at the back of a tree and i was shooting through branches.
We were at a free flight aviary so these are people aware birds, the rainbow lorikeets being very friendly, I had thrown the Samyang onto the EM1 just to give it a test run_EM42140 by aussiephil1960, on Flickr

Far from it, unfortunately I couldn't tell you what it was as I didn't look, just wound the aperture closed till I had the DOF I wanted for the shot. I know there is one nearly wide open still in the camera, give me a few hours and i'll post it for comparison.
Every time I pull this lens out and use it I love it just a little bit more,
That photo was taken in a darkened shed, no flash, the front of the train is light mainly by a couple of the LED's.
Cheers

Ok, not quite the same angle, sorry didn't have a wide open from above,
Both shots had the focal reducer mounted, this shot would have been just off wide open. Despite the difference in angle the DOF difference is quite clear.Santas Train 2 by aussiephil1960, on Flickr

Yeah sorry mate - I asked a dumb question. The dof should have given it away. #2 seems to have nice detail even if close to wide open.

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:smile: not really a dumb question per se, It does get soft absolutely wide open similar to classic portrait lenses, but as you can see sharpens up only just closed a little to T2.0 and with the focal reducer we have the light gathering still of T1.5. and the bokeh I think is creamy smooth